Not only did this take place in California, but at a High school no less, so of course it can’t happen here, a school is a gun free zone. The school went on lock down after a murder-suicide took place in the parking lot.
Just because it is a school with kids present does not mean that someone with intent will be thinking about the logistics involved. The person is not going to care due to a one track mind.
Thanks captain obvious, welcome to the party. Why do you think this series is named like it is!?